E-shopy

konventionelle Brautjungfern Kleider sind schrecklich


Fazit: manchmal, nein. Ich will nicht deine Brautjungfer sein. Aber, ich bin mehr als glücklich, Ihnen mit Sitzplänen zu helfen, zu Ihren Kleiderbeschlägen zu kommen und (sanft noch) brutal ehrlich zu sein und zu helfen, Ihre Mutter und zukünftige Schwiegermutter oder beide so weit weg von Ihnen wie möglich zu halten. Manchmal, weil ich dich nicht wirklich kenne. Wir waren entweder einmal in der Nähe und sind nicht mehr (und das ist ok!), Sind entfernte Cousins oder sind irgendwie sechs Grad sozial voneinander -, aber das macht uns nicht zu den besten Freunden oder Schwestern oder Seelenverwandten. Sagen nein erfordert eine etwas unangenehme Konversation der Braut für die freundliche Einladung danken, erklären, dass, während Sie an Bord für all die Hilfe, Unterstützung, Cheerleading und stilistische Hilfe, die sie möglicherweise auf dem Weg benötigen, fehlt Ihnen die Zeit und die Mittel zu Unterstützen sie in der Art, wie sie jetzt braucht. Übersetzung: spare ich die finanzielle Belastung, soziale Angst, schön mit Ihren langfristigen Freunden und dem potenziellen tief sitzenden Hass Ich werde fühlen, wenn Sie zeigen mir das Kleid, das Sie darauf bestehen, wird auf alle unsere Figuren erstaunlich aussehen. Unsere Freundschaft kann nicht überleben die nächsten Monate, wenn Sie mich durch die Pfingstrose gefüllt, erröten poly-Chiffon, Swarovski Kristall-verkrustet Ringer.

Lassen Sie mich auf den Punkt geschnitten: konventionelle Brautjungfern Kleider sind schrecklich. Und es ist sehr wahrscheinlich, dass die, die Sie gewählt haben, ist etwas, das ich nie tragen würde – geschweige denn etwas, das Sie tragen möchten. Bräute, die sich nicht für ihre ersten Termine, den ersten Tag der High School oder die Hochzeit von jemand anderem fertig machen konnten, ohne meine Meinung von ihrem Ensemble irgendwie zu fragen, glaube, sie haben es geschafft, das perfekte Kleid für mich – und fünf ihrer anderen Freunde – zu entdecken Der faulste Schatten der Korallen, erröten oder Beige, die die Welt je gesehen hat. Hilf mir, dir zu helfen; Lassen Sie mich wählen, was ich fühle mich am besten tragen in der Farbe Ihrer Wahl. Am Tag ist es mir egal, was ich trage, aber in dem künstlichen, papierdünnen, schlecht gearbeiteten Kleid brautmutter mode, das mich an allen falschen Stellen schneidet, werde ich mich schlechter fühlen, als du jemals warst Wollen, dass ich. Reformation bietet eine große Auswahl an Slip-Kleidern, gedruckte Boho-Looks und insgesamt super-chic Optionen für diejenigen, die etwas traditioneller-aber eine Erinnerung an die Braut, die Marke schmeichelt nicht alle Figuren schmeichelt. Am Ende des Tages, macht nichts eine Brautparty interessanter und dynamischer als lassen Sie Ihre Mädchen ihre eigenen Kleider wählen. Stress, dass sie es von überall kaufen kann, solange es saisonal angemessen ist und fällt in ein Gesamt-Farbschema. Versuchen Sie, eine nette Karte mit einem kleinen Geschenk zu übergeben, das Ihr Spickblatt umreißt: Geben Sie jeder Brautjungfer ein Muster Ihres Kleides, malen Sie Chips Ihrer gewünschten Farben und einen Antrag, Schuhe in den Farben 2-4 zu tragen. Setzen Sie den Ball in Ihre Brautjungfern Gericht und aufgeschlossen für ihre persönlichen Stile innerhalb Ihrer Hochzeit-Tages-Palette entlastet zusätzliche Unzen von Braut Stress- # Squad Ziele.

8 Advantages of Lithium Polymer Batteries

lithium polymer batteries

Lithium polymer battery is a kind of lithium-ion battery, but it has obvious advantages over liquid lithium battery (with high energy density, more compact, ultra-thin, lightweight, and high safety and size), is a novel battery. Below we detail the advantages of lithium polymer batteries.

1. Good safety performance

Lithium polymer batteries are structured in soft aluminum-plastic packaging, which is different from the metal case of liquid batteries. Once a safety hazard occurs, the liquid batteries are liable to explode, and the lithium polymer batteries can only be inflated.

2. Can be made thinner

Ordinary liquid lithium batteries adopt the method of customizing the casing first and then plugging the positive and negative electrodes. The thickness is less than 3.6mm. There is a technical limitation. The lithium-polymer battery does not have this problem. The thickness can be less than 1mm(GREPOW ultra-thin battery can be 0.4mm in thickness), which meets the current mobile phone requirements.

thin battery

3. Lightweight

Batteries with polymer weights do not require a metal case as protective packaging. Lithium polymer batteries are 40% lighter than steel-case lithium batteries of the same capacity and 20% lighter than aluminum-case batteries.

4. Large capacity

Polymer batteries have a capacity 10 ~ 15% higher than steel-case batteries of the same size and specifications, and 5 ~ 10% higher than aluminum-case batteries. They have become the first choice for color screen mobile phones and MMS mobile phones. The newest color screen and MMS mobile phones currently on the market also Polymer batteries.

5. Small internal resistance

The internal resistance of lithium polymer batteries is smaller than that of ordinary liquid batteries. At present, the internal resistance of domestic polymer batteries can even be less than 35mΩ, which greatly reduces the self-power consumption of the battery and extends the standby time of the mobile phone. It is completely possible. Reached the level of international standards. This kind of polymer lithium battery that supports large discharge current is an ideal choice for remote control model, and it has become the most promising product to replace the nickel-metal hydride battery.

novel lithium polymer battery

6. The shape can be customized

Lithium polymer batteries can increase or decrease the cell thickness according to customer needs, develop new cell models, are cheap, have short mold opening cycles, and some can even be tailored to the shape of the cell phone to fully utilize the battery case space and enhance the battery capacity.

7.Good discharge characteristics

Lithium polymer batteries use colloidal electrolytes, which are subdivided into liquid electrolytes. Colloidal electrolytes have stable discharge characteristics and a higher discharge platform.

8.Simple protection plate design

Because of the use of polymer materials, the battery core does not ignite, does not explode, and the battery core itself has sufficient safety. Therefore, the protection circuit design of lithium polymer batteries can consider omitting PTC and fuses, thereby saving battery costs.

GREPOW specializes in custom, semi-custom, and off-the-shelf lithium polymer batteries. With over 20 years of customer service experience, Grepow has developed a very complete service system, specifically tailored for our customers, which helps us in better understanding your needs in the first step of our communication, in a highly time-efficient way.

If you are interested in our lithium polymer batteries, please don’t hesitate to contact us at any time!
Email: info@grepow.com
Grepow Website: https://www.grepow.com/

Can Bluetooth Headset Battery be Replaced?

With the continuous maturity of Bluetooth technology, this function that still represents high-end configuration a few years ago has now become standard in many mid-range mobile phones, and even some low-priced products will become selling points. What followed was naturally the popularity of Bluetooth peripherals, headsets, keyboards, and gamepads, which were a bit dazzling. Among them, the development speed of Bluetooth headsets is undoubtedly accelerating. From ultra-small size, ultra-lightweight, to the ultra-long Bluetooth headset battery life, clear call quality, plus replaceable color shell and narrow LCD screen …

Buying a good Bluetooth headset is expensive now, but the battery life will end when you use it for a long time, so you can only buy the headset again, but the headset can be used in addition to the battery, and you can’t throw it away. After all, it ’s so expensive to buy So, can the current Bluetooth headset replace the battery?

Bluetooth headsets generally have a built-in lithium battery. It is reasonable to charge the battery, but some are packaged. There is no way to use this structure, but because Bluetooth headsets are updated faster and faster, various manufacturers have It is different. It is difficult to find similar headphones to match the battery. Choosing a brand is very important. It may be replaced after the sale. As for replacing the battery, it is recommended to go to some maintenance points for replacement processing, because the battery needs to be selected according to what style. If the battery is not available, that is no reason.

bluetooth headset battery

The damage and lifespan of Bluetooth headsets are most directly reflected in its fragile battery part. Due to the bug that the battery part cannot be replaced, the entire headset will be scrapped if there is a problem with the battery. The information still depends on the opinions of consumers. Although it can not be said that all the faults of the Bluetooth headset occur on the battery, the probability of damage to the Bluetooth headset is also the highest.

The length of the battery life of a Bluetooth headset is mainly related to the quality of the battery. Generally, the battery of a Bluetooth headset cannot be replaced. The Bluetooth headset uses a lithium battery. A good quality wireless Bluetooth headset battery can last for 2-3 years. And a poor-quality wireless Bluetooth headset is generally around 1.

After the AirPods battery is dead, the whole pair of headphones can only be thrown away. Apple can’t fix it either, it can only be replaced, because the design will open it and it won’t work. The first purchasers of AirPods’ battery life are gradually approaching the end.

You can usually pay attention to protect the battery, which can reduce the wear on the battery. For example, Bluetooth can be turned off when charging, and Bluetooth should not be called while charging. Here the Bluetooth headset charging method for everyone: How to Increase Bluetooth Headset Battery Life?

If you are interested in Bluetooth battery, be sure to keep coming back to our sites for further updates. Don’t hesitate to contact us at any time!
Email: info@grepow.com
Grepow Website: https://www.grepow.com/

you should take care of your real silicone sex dolls

Dim the room and add a candle if you want to create a sensual atmosphere in the room. If you want a complete fantasy, put on a headscarf. Then you can explore each person’s body and let yourself go away to fully enjoy the moment. Prepare your real sexy sex dolls/ sex toy. The male doll would be ready to lie down for my girlfriend, with lubricants and vibrators next to it. The same is true when we use female dolls. We want to make sure she is in place and ready for us to start.

The ultimate advanced sex doll is called a sexual partner and is produced by uloversdoll. This realistic doll is also distinguished from other dolls in price and quality. What is the reason for the reasonable price and why is it considered the most realistic silicone doll?

Seeing love adult dolls, we immediately knew we were dealing with high-end products. Indeed, there are no blemishes on the face, slightly Asian, casual, beautiful and sexy. Indeed, her generous chest curve and her shape give us a glimpse of what we can do, that is, everything that comes to mind. In terms of handling, the doll is very flexible and you can easily place it where you want it. This is a practical silicone doll that won’t refuse you anything.

Masturbation is the most common task for people to release heat and control their sexual desire. But after a while, masturbation can become boring. Just like when you first watched porn, flicking beans or handling meat will lose its luster. To counteract this tantalizing effect, owning and enjoying a high-end entertaining sexy TPE doll is fun and can be seen as an incredible improvement over normal old masturbation. However, there are a few tips you need to know before you start fucking the shit of your silicone companion, as this will increase the experience tenfold.

real looking love dolls

You must know that heating TPE releases oil to the environment. Therefore, you should take care of your real silicone sex dolls with baby oil from time to time. In return, the material also absorbs color pigments, which change color over time. The small amount of oil released ruined the color from the clothes!

But of course, you have some options to help you avoid this situation, or at least keep it within limits. First, you should not choose clothes that are too tight. In a hidden position of cheap silicone sex dolls, you can quickly find out if the fabric is completely dirty by rubbing a little harder. But now, the color of the sofa also affects thermoplastic elastomers. You can avoid this by habitually placing your sex doll on the cloth that comes with the delivery.

Since entering our partnership two months ago, I have become happier because I can now get closer to my loved ones. Thanks to the light weight of TPE dolls, I can do more now, and I can lie on the bed or sofa more often, so that I can get closer to the lives of loved ones.

However, if you decide to be ready to get the best product on the market, there are a few things to consider carefully. In this detailed guide, everything has been highlighted. Of course, before considering other things, you need to set a clear price. Here are some of the appropriate fee options we encountered. Real love dolls in this range are popular on comedy TV shows and bachelor parties. It’s made of latex or vinyl and can be easily stored and packaged in tight or confined spaces.

Atten AT937 50W CNC Soldering Station

MCU controlled temperature calibration with PID system equipped.
Imported heat-resistant materials heater with long life.
The heater using low voltage AC source to ensure the antistatic and no leakage, no interference.
Steady temperature setting with 200~480℃.
Rapid heating-up.
Legerity handle suitable for long time operation.
Unique temperature locks setting to avoid adjusting temperature.
Using split design, easy to place.
RC Jet
Sky Flight Rc Jet
Dynam Rc Jet
kerui Security alarm
weller soldering
Flightline RC Plane
FMS RC Plane</a
https://www.atten.com/products/atten-at937-50w-cnc-soldering-station.html

Specifications: Packing list: Standard Packing:
Voltage: AC (100V/110V/120V||220V/230V/240V) 50/60Hz(Optional) Main Unit: 1 Unit Inner box: 26.5x23x16(cm)
Power:50W Handle set : 1 PCS N.W.: 1.6kg
Temperature range:200~480°C Iron stand: 1 PCS G.W.: 1.78kg
Temperature stability:±2℃ (in still air, no load) AC cord: 1 PCS Carton: 12 PCS/Carton
Setting Manner:knob control Manual: 1 Copy Size: 55x48x50.5(cm)
Heater:Four core stainless steel heater Cleaning sponge: 1 PCS N.W.: 19.2kg
Tip-to-ground impedance:< 2Ω G.W.: 21.4kg
Tip-to-ground voltage:< 2mV

Vintage kožené kabelky

Podlehněte kouzlu přírodních kožených kožených kabelek, které navenek vypadají jakoby na světě existovaly spoustu let, ale ve skutečnosti jsou nové a luxusní. Ano řeč je kabelkách v takzvaném vintage stylu, které maximálně podtrhnou  váš vzhled a lásku k přírodním materiálům, jakým je kvalitní telecí kůže.

Projděte si naši širokou nabídku kvalitních kožených vintage kabelek, které jsou s láskou ručně vyráběné v dílnách italské Florencie a mají neotřelí přírodní vzhled, který nikdy neomrzí.

Vintage kabelky jsou vyráběny z té nejkvalitnější telecí kůže a přibarvovány přírodními barvivy tak, že jakoby na oko nesou známky dlouholetého používání. Navíc pokud se o kůži vintage kabelek dobře staráte, pak časem dostávají zvláštní patinu a jsou velmi atraktivní ať už je nosí mladé slečny nebo dámy ve vyšším věku.

Kožené vintage kabelky tedy můžete s přehledem s sebou vzít jak do společnosti, tak i do města za nákupy nebo i do přírody.

Projděte si naši širokou nabídku luxusních kožených vintage kabelek a vyberte si tu svou!

Faraon-sandals.cz

How to Choose Batteries for Medical Devices?

medical

Modern switching mode power supplies are used in a variety of medical devices, including MRI, X-ray, CT and PET scanners, blood analyzers, DNA equipment, patient monitors, ultrasounds, robotic surgical equipment, cardiopulmonary machines, diagnostic equipment, and automated pharmaceutical dispensers, to name a few. As with all electronics, the trend in medical devices is to make them smaller, lighter, more efficient, more reliable and more competitively priced. Safety standards for medical equipment depending on the application, proximity to patients and operators, and the location and environment of the equipment.

In the design of medical electronic devices, one consideration takes precedence over all others: the safety of the patient and the operator. In some cases, it may be tempting to think that a power source that has been designed and certified for industrial use might also be suitable for medical battery. Often this is not the case, as the risks involved vary greatly.

In addition, many electronic devices used in hospitals (such as patient monitors) operate with very low levels of signals. Medical devices like these tend to be more sensitive to electromagnetic interference (EMI) than most devices used in industry, making EMC (electromagnetic compatibility) compliance and performance a key issue in medical applications.

Protect patients and operators

Hospital patients are often in a vulnerable state. Exposure to even small leakage currents can have adverse effects on their health. The same small leakage current has little effect on healthy people and may be acceptable in industrial applications. Depending on the application, the “permissible leakage current” of the resulting medical device (not just the power source) can range from A few microns (microamps) to A few hundred.”Leakage current” can be defined as an unexpected and potentially harmful current that can pass through the body. Obviously, medical devices that have direct physical contact with patients must limit their leakage current to a specified minimum level.

patients and medical staff

Medical power safety standard

Medical requirements differ from standard power supplies. For example, the enhanced or double insulation in a 240Vac power supply must be able to withstand a dielectric test of 4kVac for medical applications, while the corresponding figure for ITE/industrial USES is only 3kVac.As with spacing, this difference must be taken into account when selecting a power supply. A power supply approved below 4kVac May be used as part of an enhanced barrier for medical applications provided that insulation within the power supply is considered to be a smaller “basic” or “supplementary” barrier. In this case, additional isolation must be provided within the terminal product medical device through the device. The manufacturer shall meet the requirements of strengthening the barrier between the ac power supply and the patient.

Tips for selecting a medical battery

Modern medical devices require compact, lightweight, efficient, economical, RoHS compliant, reliable and ultra-safe power sources. Switching mode power supplies can meet all these requirements, but not all power supplies are the same. Medical equipment OEMs should pay attention to selecting power sources from reputable suppliers, preferably with mature experience in the medical electronics field and a full understanding of the special requirements and changing standards of the professional industry.

Obviously, it is foolish to choose a medical battery based on the lowest price, because the high cost of potential legal action, product recalls, brand name damage and warranty repairs far outweigh any potential cost savings on the front end. Medical OEMs should also take care to ensure that their selected power sources are fully compliant and certified to the current version of IEC, EN, UL, and CSA medical safety standards. Taking these precautions will make it easier for new medical devices to be certified by responsible safety agencies and the FDA.

Customized batteries for medical devices

Lithium batteries have the advantages of high energy density, small size, lightweight, long life, good battery capacity maintenance, wide operating temperature range, and other advantages, to meet the requirements of portable medical equipment lightweight, mobility.

As the world’s leading designer and manufacturer of the custom batteries for more than 20 years. Grepow Battery continually devotes our resources and efforts to developing higher performing & critically reliable rechargeable batteries for medical devices. Lithium batteries for medical devices produced by Grepow have complete safety protection circuit, equalization circuit and battery management unit (BMU), and the combination of multiple serial lithium batteries is strict with high consistency. The product has been tested under different temperature, current, shelf life and other conditions, including various abuse tests, to ensure the safety performance of the battery.

Medical instrument lithium battery pack is widely used in the B ultrasound machine, ECG monitor, infusion pump, ventilator, anesthesia machine, light curing machine, physical therapy, rehabilitation instrument and so on.

Novel medical battery

Based on the advanced technology, stringent quality control, and cost competitiveness, it is able to offer a wide range( -40 ℃~50 ℃ or 20 ℃~80 ℃) of quality batteries to meet customers’ ever-growing demands for higher performance, higher energy density, safer, lighter weight and 1000 cycles life. Custom shaped batteries to fit into any and all available space in your product for maximum efficiency.

Grepow has passed IS09001, ISO14001, TS16949, OHSAS18001 quality system certification, and our products can pass ROHS, CE, UL, UN38.3, MSDS, and other certification. If you need any product certifications, please let us know and we can help to apply for the certification for you.

certification

So far, Grepow sales network covers all areas of China, most areas of Asia, Europe, America, Austria, and some areas of Africa. They also have established offices in Xinjiang, Germany, and the U.S.A. to provide better service to their customers for delivery efficiency and after-sales service.

If you are interested in our products, please don’t hesitate to contact us at any time!
Email: info@grepow.com
Grepow Website: https://www.grepow.com/

How Does Cold Weather Affect Batteries?

cold weather

In the low-temperature environment, the chemical reaction rate becomes slower, the resistance value of the electrolyte becomes larger, the lithium-ion traversing performance becomes worse, the activity decreases, and the discharge current becomes smaller, resulting in a decrease in the usable capacity of the battery. Lithium batteries consume a lot of power at low temperatures, which is actually the illusion of everyone. The essence is that the battery capacity of the lithium battery itself is reduced.

Electrical conductivity and material activity in the cell

Experimental data: The power consumption of the same mobile phone at -5 °C is 1.7 times that of 20 °C. The essence is that the current of the lithium battery becomes smaller and the available capacity is reduced.

When the mobile phone detects that the battery capacity is low, and the ambient temperature is low, resulting in a small current, the temperature protection circuit in the battery built-in protection board is activated, and the mobile phone will automatically shut down. When the ambient temperature returns to the normal value and the temperature protection circuit are turned off, the mobile phone can work normally.

In order to avoid the above situation, in the low-temperature environment, it is best not to use the mobile phone for a long time. When you go out, you should put the mobile phone in your pocket, pack and other places where you can keep warm. You can also buy a thick mobile phone case for your mobile phone to keep warm.

low temp battery application

In fact, condensed water is more serious than low temperature. Returning from the cold outside to the indoors, the warm air in the room condenses in the cold, and water vapor is generated on the mobile phone. If water vapor enters the motherboard, the phone will get wet, crash or fail to boot. Therefore, in the case of a large temperature difference, avoid the phone is exposed, if you have to talk, you can plug in the headset.

In fact, many factors will affect the mobile phone battery, but the temperature has the greatest impact on the battery. The impact of low temperature on the mobile phone battery is mainly manifested in three aspects. First, as mentioned above, it will affect the conductivity and material activity in the battery. To reduce the battery capacity, secondly, the low temperature easily causes the circuit board to form a mist and cause a short circuit. In addition, the battery is affected by the low-temperature environment for a long time.

If it is only studied from the viewpoint of capacity, the electrolyte used for the lithium battery acts as an organic liquid, like grease, and becomes viscous or even condensed at a low temperature. At this time, the activity of the conductive lithium salt is greatly limited in the inside, so that the charging efficiency is very low, which may cause the lithium battery to be charged slowly at a low temperature, and the charging is not full, and the discharge is also the same.

The perspective of battery capacity

Although the normal operating temperature of the mobile phone battery is relatively wide, as the temperature is lowered, the discharge performance of the lithium battery will be significantly reduced, the discharge platform will be significantly reduced, and the discharge capacity will be significantly reduced. However, because of the different battery performance of different brands, there is a certain difference in low-temperature resistance. Therefore, some users say that the capacity change of a battery with a capacity of 3000 mA at 30 degrees in a low-temperature environment is unpredictable but generally Say, as long as the temperature is above zero degrees Celsius, the available capacity of the mobile phone battery will not drop significantly.

low temperature shaped battery

In addition, it seems that there is no official data on the influence of temperature on battery capacity on the Internet. Only the capacity performance of a certain brand battery affected by temperature can be found. You can refer to When the temperature drops to -30 °C, the discharge capacity of the battery is the room temperature discharge capacity. 87.0%, the average discharge voltage is reduced by 0.598V compared with room temperature, and the stored energy is only about 70% of the ordinary environment. The constant current charging capacity of the lithium-ion battery is only 14% of the total charging capacity, and the constant voltage charging time is It will also become very long.

It can be seen that the effect of extremely low temperature on the battery is very large, but it is not as exaggerated as we think. It is estimated that the temperature should be below 10 degrees and the battery capacity should be more than 90% efficient. If you can avoid exposing your phone to a low temperature when you are at a low ambient temperature, try to keep your phone’s operating temperature above zero degrees Celsius. After using it for a while, the mobile phone’s own heat will gradually work.

Custom low-temperature battery

Grepow low temperature battery can effectively improve the discharge performance of the battery in the low-temperature environment, reduce the internal resistance of the battery, and achieve the effect of high rate discharge. Therefore, its battery life is longer and its power is stronger. This is also one of the core technologies of Grepow, which has the following advantages:

Wide operating temperature range, -40 ° C to 50 ° C. Compared with traditional Li-Polymer batteries, it has broken through the discharge temperature limits of -20℃ to 60℃.

Low Temperature Shaped Battery

High performance of discharge at low-temperature, the lowest one is able to discharge over 60% efficiency @0.2C at -40℃, and discharge over 80% efficiency @0.2C at -30℃.

Flexible size, the battery can be designed according to customer’s size. For example, irregularly shaped batteries:

 ●Ultra Thin BatteryCurved BatteryRound batteriesTriangle BatteryHexagon BatteryUltra Narrow BatteryC Shape BatteryD Shape BatteryPolygonal Battery 

Can be widely used in cold climates and military products. With the ability to mass production, cell consistency is good.

If you are interested in our products, please don’t hesitate to contact us at any time!
Email: info@grepow.com
Grepow Website: https://www.grepow.com/

How Does Cold Weather Affect Batteries?

cold weather

In the low-temperature environment, the chemical reaction rate becomes slower, the resistance value of the electrolyte becomes larger, the lithium-ion traversing performance becomes worse, the activity decreases, and the discharge current becomes smaller, resulting in a decrease in the usable capacity of the battery. Lithium batteries consume a lot of power at low temperatures, which is actually the illusion of everyone. The essence is that the battery capacity of the lithium battery itself is reduced.

Electrical conductivity and material activity in the cell

Experimental data: The power consumption of the same mobile phone at -5 °C is 1.7 times that of 20 °C. The essence is that the current of the lithium battery becomes smaller and the available capacity is reduced.

When the mobile phone detects that the battery capacity is low, and the ambient temperature is low, resulting in a small current, the temperature protection circuit in the battery built-in protection board is activated, and the mobile phone will automatically shut down. When the ambient temperature returns to the normal value and the temperature protection circuit are turned off, the mobile phone can work normally.

In order to avoid the above situation, in the low-temperature environment, it is best not to use the mobile phone for a long time. When you go out, you should put the mobile phone in your pocket, pack and other places where you can keep warm. You can also buy a thick mobile phone case for your mobile phone to keep warm.

low temp battery application

In fact, condensed water is more serious than low temperature. Returning from the cold outside to the indoors, the warm air in the room condenses in the cold, and water vapor is generated on the mobile phone. If water vapor enters the motherboard, the phone will get wet, crash or fail to boot. Therefore, in the case of a large temperature difference, avoid the phone is exposed, if you have to talk, you can plug in the headset.

In fact, many factors will affect the mobile phone battery, but the temperature has the greatest impact on the battery. The impact of low temperature on the mobile phone battery is mainly manifested in three aspects. First, as mentioned above, it will affect the conductivity and material activity in the battery. To reduce the battery capacity, secondly, the low temperature easily causes the circuit board to form a mist and cause a short circuit. In addition, the battery is affected by the low-temperature environment for a long time.

If it is only studied from the viewpoint of capacity, the electrolyte used for the lithium battery acts as an organic liquid, like grease, and becomes viscous or even condensed at a low temperature. At this time, the activity of the conductive lithium salt is greatly limited in the inside, so that the charging efficiency is very low, which may cause the lithium battery to be charged slowly at a low temperature, and the charging is not full, and the discharge is also the same.

The perspective of battery capacity

Although the normal operating temperature of the mobile phone battery is relatively wide, as the temperature is lowered, the discharge performance of the lithium battery will be significantly reduced, the discharge platform will be significantly reduced, and the discharge capacity will be significantly reduced. However, because of the different battery performance of different brands, there is a certain difference in low-temperature resistance. Therefore, some users say that the capacity change of a battery with a capacity of 3000 mA at 30 degrees in a low-temperature environment is unpredictable but generally Say, as long as the temperature is above zero degrees Celsius, the available capacity of the mobile phone battery will not drop significantly.

low temperature shaped battery

In addition, it seems that there is no official data on the influence of temperature on battery capacity on the Internet. Only the capacity performance of a certain brand battery affected by temperature can be found. You can refer to When the temperature drops to -30 °C, the discharge capacity of the battery is the room temperature discharge capacity. 87.0%, the average discharge voltage is reduced by 0.598V compared with room temperature, and the stored energy is only about 70% of the ordinary environment. The constant current charging capacity of the lithium-ion battery is only 14% of the total charging capacity, and the constant voltage charging time is It will also become very long.

It can be seen that the effect of extremely low temperature on the battery is very large, but it is not as exaggerated as we think. It is estimated that the temperature should be below 10 degrees and the battery capacity should be more than 90% efficient. If you can avoid exposing your phone to a low temperature when you are at a low ambient temperature, try to keep your phone’s operating temperature above zero degrees Celsius. After using it for a while, the mobile phone’s own heat will gradually work.

Custom low-temperature battery

Grepow low temperature battery can effectively improve the discharge performance of the battery in the low-temperature environment, reduce the internal resistance of the battery, and achieve the effect of high rate discharge. Therefore, its battery life is longer and its power is stronger. This is also one of the core technologies of Grepow, which has the following advantages:

Wide operating temperature range, -40 ° C to 50 ° C. Compared with traditional Li-Polymer batteries, it has broken through the discharge temperature limits of -20℃ to 60℃.

Low Temperature Shaped Battery

High performance of discharge at low-temperature, the lowest one is able to discharge over 60% efficiency @0.2C at -40℃, and discharge over 80% efficiency @0.2C at -30℃.

Flexible size, the battery can be designed according to customer’s size. For example, irregularly shaped batteries:

 ●Ultra Thin BatteryCurved BatteryRound batteriesTriangle BatteryHexagon BatteryUltra Narrow BatteryC Shape BatteryD Shape BatteryPolygonal Battery 

Can be widely used in cold climates and military products. With the ability to mass production, cell consistency is good.

Can You Overcharge a Bluetooth Headset?

Bluetooth headset battery charging time and overcharging is not a concept. Overcharge means that the voltage is higher than the charge cut-off voltage during charging, and the general lithium battery is 4.2V. The voltage determines whether the battery is overcharged and has nothing to do with how much time to charge. But the consumers will take too long to charge as an overcharge.

After charging the Bluetooth headset

After the Bluetooth headset is fully charged, a prompt will be given on the headset or charger, such as the change of the indicator color or the indicator light is off. Most of the electronic products currently on the market use of lithium batteries. The batteries have been activated at the factory, and the lithium batteries have no memory, so they can be used as needed. When the display battery is full, you can turn off the power (you can charge another 1-2 hours after the first three times).

Charging voltage

Generally, due to the battery management chip in the charger or Bluetooth headset, the highest output voltage to the positive and negative terminals of the battery is 4.2V. Even if it is over, there is a protective board built into the lithium battery. This means that the voltage to the cell will never exceed 4.2V. It will not be overcharged for a long time. There is a large Bluetooth headset that can be safely charged, so doing so will not damage the Bluetooth headset battery.

grepow wearable battery

Use of charger

But be careful not to plug in the charger for too long, such as two days a day. If it is too long, the charger will also be charged. Secondly, the Bluetooth headset will cut off the power, so the battery will be used. This may start charging again, then fill it up, then use it again, although the shallower The charge and discharge have little effect on the life of the lithium battery, it has always been to reduce the service life.

Lithium battery overcharging is terrible, and the damage is considered to be good luck. If it is serious, it may explode. The charging explosion in the previous news is the flaw of the design product. The space explosion on the lithium battery is caused by the explosion. Under normal circumstances, the polymer lithium battery will only bulge, leak, and will not explode. It’s okay to charge so many people around, and from another side, the Bluetooth headset battery will hardly overcharge.

Bluetooth headset battery charging tips

1. Do not over-discharge

When the device prompts “The battery is low”, it should be charged; until the device is automatically turned off, it will be charged, and the battery has been over-discharged. This can affect battery life. So when the Bluetooth headset indicates low battery, you can charge.

bluetooth headset battery

2. Do not overcharge

When the charger is full, you should unplug the charger. Nowadays, the charger generally has a design that is full of self-stopping. It is no problem to remove the battery from the charger for a short time, but the battery is left on the charger for a long time, and the voltage of the grid rises late at night, the charger that has stopped charging. After the voltage rises, it will continue to charge, causing the battery to be overcharged. This can affect battery life.

3. Keep the battery

If the battery is not used for a long time, it should be charged to 60%, stored separately in a cool and dry place, and recharged every 4 or 5 months.

4. Standby charging

It is recommended not to use the Bluetooth headset when charging, standby charging.

Proper use of the battery will ensure battery life. The Bluetooth headset battery is double-protected. The adapter has a protection board. The battery has a protection board. When it exceeds the minimum voltage of the protection board, it stops discharging. The charging principle is the same. Basically, there will be no problem with overcharge and over-discharge. If the Bluetooth headset battery is really overcharged, you can’t charge it. So feel free to use your Bluetooth headset.

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